QGIS API Documentation 3.34.0-Prizren (ffbdd678812)
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qgshistogramwidget.h
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1/***************************************************************************
2 qgshistogramwidget.h
3 --------------------
4 begin : May 2015
5 copyright : (C) 2015 by Nyall Dawson
6 email : nyall dot dawson at gmail dot com
7 ***************************************************************************/
8
9/***************************************************************************
10 * *
11 * This program is free software; you can redistribute it and/or modify *
12 * it under the terms of the GNU General Public License as published by *
13 * the Free Software Foundation; either version 2 of the License, or *
14 * (at your option) any later version. *
15 * *
16 ***************************************************************************/
17#ifndef QGSHISTOGRAMWIDGET_H
18#define QGSHISTOGRAMWIDGET_H
19
20#include "ui_qgshistogramwidgetbase.h"
21#include "qgis_sip.h"
22
23#include "qgshistogram.h"
26#include <QPen>
27#include <QBrush>
28#include "qgis_gui.h"
29
30class QgsVectorLayer;
32class QwtPlotPicker;
33class QwtPlotMarker;
34class QwtPlot;
35class HistogramItem;
36class QwtPlotHistogram;
37
38// fix for qwt5/qwt6 QwtDoublePoint vs. QPointF
39typedef QPointF QwtDoublePoint;
40
49class GUI_EXPORT QgsHistogramWidget : public QWidget, private Ui::QgsHistogramWidgetBase
50{
51 Q_OBJECT
52
53 public:
54
62 QgsHistogramWidget( QWidget *parent SIP_TRANSFERTHIS = nullptr, QgsVectorLayer *layer = nullptr, const QString &fieldOrExp = QString() );
63
64 ~QgsHistogramWidget() override;
65
71 QgsVectorLayer *layer() { return mVectorLayer; }
72
79 QString sourceFieldExp() const { return mSourceFieldExp; }
80
89 void setPen( const QPen &pen ) { mPen = pen; }
90
96 QPen pen() const { return mPen; }
97
105 void setBrush( const QBrush &brush ) { mBrush = brush; }
106
112 QBrush brush() const { return mBrush; }
113
120 void setGraduatedRanges( const QgsRangeList &ranges );
121
128 QgsRangeList graduatedRanges() const { return mRanges; }
129
135 QString xAxisTitle() const { return mXAxisTitle; }
136
143 void setXAxisTitle( const QString &title ) { mXAxisTitle = title; }
144
150 QString yAxisTitle() const { return mYAxisTitle; }
151
158 void setYAxisTitle( const QString &title ) { mYAxisTitle = title; }
159
160 public slots:
161
165 void refreshValues();
166
171 void refresh();
172
178 void setLayer( QgsVectorLayer *layer );
179
185 void setSourceFieldExp( const QString &fieldOrExp );
186
187 protected:
188
192 virtual void drawHistogram();
193
194 QwtPlot *mPlot = nullptr;
196 QList< QwtPlotMarker * > mRangeMarkers;
197
198 private:
199
200 QgsVectorLayer *mVectorLayer = nullptr;
201 QString mSourceFieldExp;
202 QList<double> mValues;
204 QgsHistogram mHistogram;
205 QVector<QColor> mHistoColors;
206 QPen mPen;
207 QBrush mBrush;
208 QPen mMeanPen;
209 QPen mStdevPen;
210 QPen mGridPen;
211 QString mXAxisTitle;
212 QString mYAxisTitle;
213
214 void clearHistogram();
215
216 QwtPlotHistogram *createPlotHistogram( const QString &title, const QBrush &brush, const QPen &pen = Qt::NoPen ) const;
217
218};
219
220#endif //QGSHISTOGRAMWIDGET_H
Graphical histogram for displaying distributions of field values.
QString xAxisTitle() const
Returns the title for the histogram's x-axis.
QList< QwtPlotMarker * > mRangeMarkers
QgsRangeList graduatedRanges() const
Returns the graduated ranges associated with the histogram.
QPen pen() const
Returns the pen used when drawing histogram bars.
void setYAxisTitle(const QString &title)
Sets the title for the histogram's y-axis.
void setPen(const QPen &pen)
Sets the pen to use when drawing histogram bars.
QString sourceFieldExp() const
Returns the source field name or expression used to calculate values displayed in the histogram.
void setXAxisTitle(const QString &title)
Sets the title for the histogram's x-axis.
void setBrush(const QBrush &brush)
Sets the brush used for drawing histogram bars.
QBrush brush() const
Returns the brush used when drawing histogram bars.
QgsVectorLayer * layer()
Returns the layer currently associated with the widget.
QString yAxisTitle() const
Returns the title for the histogram's y-axis.
Calculator for a numeric histogram from a list of values.
Calculator for summary statistics for a list of doubles.
Represents a vector layer which manages a vector based data sets.
#define SIP_TRANSFERTHIS
Definition qgis_sip.h:53
QPointF QwtDoublePoint
QList< QgsRendererRange > QgsRangeList